1 files changed, 1 insertions, 1 deletions

diff --git a/subprojects/language/src/main/java/tools/refinery/language/GenerateProblem.mwe2 b/subprojects/language/src/main/java/tools/refinery/language/GenerateProblem.mwe2
index 59eba8f7..46ac18fe 100644
--- a/subprojects/language/src/main/java/tools/refinery/language/GenerateProblem.mwe2
+++ b/subprojects/language/src/main/java/tools/refinery/language/GenerateProblem.mwe2
@@ -51,7 +51,7 @@ Workflow {
 
                 language = StandardLanguage {
                         name = 'tools.refinery.language.Problem'
-                        fileExtensions = 'problem'
+                        fileExtensions = 'problem,refinery'
                         referencedResource = 'platform:/resource/tools.refinery.refinery-language-model/model/problem.genmodel'
                         serializer = {
                                 generateStub = false